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Review of Plant Studies

December 2020, Volume 7, 1, pp 16-26

Chemical Control of Alternaria Brown Spot on Mandarins Cultivars in Tunisia

Maali Haddad


Najwa Benfradj


Ibtissem Ben Salem


Mahdi Mabrouk


Naima Boughalleb-M Hamdi

Maali Haddad 1 Najwa Benfradj 1 ,
Ibtissem Ben Salem 1 Mahdi Mabrouk 4
Naima Boughalleb-M Hamdi 1 

  1. Department of Biological Sciences and Plant Protection, High Institute of Agronomy of Chott Mariem, Sousse, University of Sousse, Tunisia. 1

  2. Centre Technique des Agrumes, Tunisia. 4

Pages: 16-26

DOI: 10.18488/journal.69.2020.71.16.26

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Article History:

Received: 30 September, 2020
Revised: 04 November, 2020
Accepted: 01 December, 2020
Published: 28 December, 2020


Three field experiments were conducted to evaluate the efficiency of seven active ingredients (Tryfloxystrobin, Iprodione, Procymidone, Mancozebe, Propinebe, Tebuconazole and Coppersulfate), against Alternaria brown spot (ABS) caused by Alternaria alternata on Minneola, Fortune, Nova and Tangerine mandarins citrus cultivars in Tunisia. Over the three trials, citrus trees received 6, 10 and 16 fungicides sprays. The results of the present investigation demonstrated the prevention ability of Mancozebe, Iprodione and Copper sulfate according to disease incidence, fruit infection and losses caused by ABS. Furthermore, the applications of those three fungicides used in mixture reduce the ABS development. In fact, disease incidence was reduced better after an application of a mixture of Mancozebe and Iprodione compared to application of Mancozebe or Iprodione alone and after an application of an alternation of Mancozebe and Iprodione with copper sulfate. From this study, it revealed that the incidence of ABS, an emerging fungi disease on Citrus in Tunisia, could be reduced by using chemical products.
Contribution/ Originality
This study documents the evaluation of the efficiency of seven active ingredients against citrus Alternaria brown spot caused by Alternaria alternata on Minneola, Fortune, Nova and Tangerine mandarin cultivars in Tunisia.


Alternaria alternata, Alteration, Citrus, Fungicides, Mixture.


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This study received no specific financial support.

Competing Interests:

The authors declare that they have no competing interests.


All authors contributed equally to the conception and design of the study.

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